The Alien-Nazi-Conspiracy Theory Network-Out: History Channel :wacko:

[deadlegion]

I forgot some sound cards come with an extra IDE connector. My brother has a Sound Blaster on the way. Pretty excited to upgrade from the PC Speaker.

If you got time, see if you can locate a 486DX 25 or 33MHz 169 pins (NOT 168) or maybe even a 486DX2OD66. Maybe you have a 'free' one in one of your boxes of CPUs.

I actually have another spare soundcard and CD rom combo exactly the same.

For the cpu...

Intel DX 33MHz
Intel DX2 66MHz
AMD DX2 66MHz
Intel DX20DPR66 (Overdrive) x2
IBM Cyrix DX4
AMD Am5x86 133

They're all 168 pin afaik. I'm not seeing any 169 pin in my box.

[Jazzmarazz]

I actually have another spare soundcard and CD rom combo exactly the same.

For the cpu...

Intel DX 33MHz
Intel DX2 66MHz
AMD DX2 66MHz
Intel DX20DPR66 (Overdrive) x2
IBM Cyrix DX4
AMD Am5x86 133

They're all 168 pin afaik. I'm not seeing any 169 pin in my box.

Thats ok. I actually couldn't find any on ebay either. A youtube video I watched said you could find them pretty easily, but no luck. That Intel DX20DPR66 make me jealous...too bad its a 168.

[deadlegion]

Why do you want 169 pin cpu? If you've got a mb with an upgrade/coprocessor socket you don't need to fill that. You just swap out the main cpu for a better one.

[deadlegion]

168 cpu works on 169 iirc you only need to worry about voltage with these cpu's. Later motherboards can handle all voltages so you can run DX4 or whatever you want.

[Jazzmarazz]

Why do you want 169 pin cpu? If you've got a mb with an upgrade/coprocessor socket you don't need to fill that. You just swap out the main cpu for a better one.

Yeah, its a math co-processor socket. The factory 486 is soldered to the mobo, so I can't just swap. If I understand correctly, adding the co-processor allows for the two to share the workload by allowing the second CPU to perform more complex mathematics. No?
In any case, its unnecessary. My brother just wants to max it out.

[deadlegion]

The IBM Cyrix DX4 is probably the rarer of those chips I have there.

Does the motherboard have socket 1 (169 pin) or does it have two sockets? (168 and 169 pin).

[deadlegion]

Yeah, its a math co-processor socket. The factory 486 is soldered to the mobo, so I can't just swap. If I understand correctly, adding the co-processor allows for the two to share the workload by allowing the second CPU to perform more complex mathematics. No?
In any case, its unnecessary. My brother just wants to max it out.

You can use a 168 pin cpu in the 169 socket. Use an Intel DX20DPR66 Overdrive 168 pin they're easier to find.

[deadlegion]

DX cpu's have built-in math coprocessor so the original cpu is basically superfluous.

[deadlegion]

Hmmm, I did some reading about surface mount SX (I've never had to deal with a mb like that tbh) and apparently not all such boards can use 168 pin cpu in the 169 pin socket.
The extra pin is just to disable the primary cpu...yes the whole math co-processor thing was just a scam really as adding another cpu is all about disabling the original one.

Some motherboards with an upgrade socket (169, 237, or 238 pin) have a jumper to disable the onboard processor. This feature may allow a CPU that does not have the upgrade pin (which disables the onboard processor) to work in the upgrade socket provided the correct pinout is supplied to the chip.

386 with math co-processor and also 386/486 hybrid mb's actually use both cpu's afaik so they're different.

So maybe you're right about looking for a 169 pin chip I guess you know what you're doing

[Jazzmarazz]

Hmmm, I did some reading about surface mount SX (I've never had to deal with a mb like that tbh) and apparently not all such boards can use 168 pin cpu in the 169 pin socket.
The extra pin is just to disable the primary cpu...yes the whole math co-processor thing was just a scam really as adding another cpu is all about disabling the original one.


386 with math co-processor and also 386/486 hybrid mb's actually use both cpu's afaik so they're different.

So maybe you're right about looking for a 169 pin chip I guess you know what you're doing

The info I have is from a youtube video by a guy who just uploaded a bunch of failure videos...He did eventually get a second cpu working, but he only stated that it was becuase of the extra pin. A pin I found to be called "key"
If the pin does in fact only act as a jumper, then I could easily solder either a jumper or even a switch within the case so I could use a 168 pin cpu. Flipping the switch may even allow me to switch between the active CPU, or between a system running at 25MHs and 66MHz. Some games are sensitive to the processor speed after all. If I already had a 168-pin cpu on hand to try out, I would do so. In the meantime I will just pass on the idea.

[deadlegion]

So there isn't a jumper setting on the mb for cpu upgrade? It may not be marked as such might just be a jumper number.

[deadlegion]

Can that mb run 5 or 3v cpu's?

[Jazzmarazz]

So there isn't a jumper setting on the mb for cpu upgrade? It may not be marked as such might just be a jumper number.

Not that I found and the video I mentioned stated he couldn't find one either.

Can that mb run 5 or 3v cpu's?

You know, I just assumed 5v but I never actually checked. ... ok, I have on idea. I couldn't find the info. what did you need to know that for?

[deadlegion]

If it has both voltages there could be more possibilities. AMD X5 uses lower voltage and is generally regarded as the best CPU.

[TheRealSpiders]

Boy, I sure am glad that the weather here went from 900 degrees lava plumes to 40 degrees and 20 inches of rain. Yay! Mid-Atlantic United States!

Spoiler warning:

Really it's just an excuse for me to stay in and play video games.